#tag_div {position:relative; width:320px; height:320px; border:0px solid #000; margin: 1px auto 0; }
#tag_div a {position:absolute; top:0px; left:0px; font-family: Microsoft YaHei; color:#000; font-weight:bold; text-decoration:none; padding: 3px 6px; }
#tag_div a:hover {border: 1px solid #eee; background: red; color:yellow;}
#tag_div .blue {color:blue;}
#tag_div .red {color:red;}
#tag_div .green {color:green;}